//========================================================================
// GLFW 3.3 X11 - www.glfw.org
//------------------------------------------------------------------------
// Copyright (c) 2002-2006 Marcus Geelnard
// Copyright (c) 2006-2019 Camilla Löwy <elmindreda@glfw.org>
//
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any damages
// arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented; you must not
//    claim that you wrote the original software. If you use this software
//    in a product, an acknowledgment in the product documentation would
//    be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such, and must not
//    be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source
//    distribution.
//
//========================================================================
// It is fine to use C99 in this file because it will not be built with VS
//========================================================================

#include "internal.h"

#include <X11/Xresource.h>

#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include <stdio.h>
#include <locale.h>

// Translate the X11 KeySyms for a key to a GLFW key code
// NOTE: This is only used as a fallback, in case the XKB method fails
//       It is layout-dependent and will fail partially on most non-US layouts
//
static int translateKeySyms(const KeySym* keysyms, int width) {
  if (width > 1) {
    switch (keysyms[1]) {
      case XK_KP_0:
        return GLFW_KEY_KP_0;
      case XK_KP_1:
        return GLFW_KEY_KP_1;
      case XK_KP_2:
        return GLFW_KEY_KP_2;
      case XK_KP_3:
        return GLFW_KEY_KP_3;
      case XK_KP_4:
        return GLFW_KEY_KP_4;
      case XK_KP_5:
        return GLFW_KEY_KP_5;
      case XK_KP_6:
        return GLFW_KEY_KP_6;
      case XK_KP_7:
        return GLFW_KEY_KP_7;
      case XK_KP_8:
        return GLFW_KEY_KP_8;
      case XK_KP_9:
        return GLFW_KEY_KP_9;
      case XK_KP_Separator:
      case XK_KP_Decimal:
        return GLFW_KEY_KP_DECIMAL;
      case XK_KP_Equal:
        return GLFW_KEY_KP_EQUAL;
      case XK_KP_Enter:
        return GLFW_KEY_KP_ENTER;
      default:
        break;
    }
  }

  switch (keysyms[0]) {
    case XK_Escape:
      return GLFW_KEY_ESCAPE;
    case XK_Tab:
      return GLFW_KEY_TAB;
    case XK_Shift_L:
      return GLFW_KEY_LEFT_SHIFT;
    case XK_Shift_R:
      return GLFW_KEY_RIGHT_SHIFT;
    case XK_Control_L:
      return GLFW_KEY_LEFT_CONTROL;
    case XK_Control_R:
      return GLFW_KEY_RIGHT_CONTROL;
    case XK_Meta_L:
    case XK_Alt_L:
      return GLFW_KEY_LEFT_ALT;
    case XK_Mode_switch: // Mapped to Alt_R on many keyboards
    case XK_ISO_Level3_Shift: // AltGr on at least some machines
    case XK_Meta_R:
    case XK_Alt_R:
      return GLFW_KEY_RIGHT_ALT;
    case XK_Super_L:
      return GLFW_KEY_LEFT_SUPER;
    case XK_Super_R:
      return GLFW_KEY_RIGHT_SUPER;
    case XK_Menu:
      return GLFW_KEY_MENU;
    case XK_Num_Lock:
      return GLFW_KEY_NUM_LOCK;
    case XK_Caps_Lock:
      return GLFW_KEY_CAPS_LOCK;
    case XK_Print:
      return GLFW_KEY_PRINT_SCREEN;
    case XK_Scroll_Lock:
      return GLFW_KEY_SCROLL_LOCK;
    case XK_Pause:
      return GLFW_KEY_PAUSE;
    case XK_Delete:
      return GLFW_KEY_DELETE;
    case XK_BackSpace:
      return GLFW_KEY_BACKSPACE;
    case XK_Return:
      return GLFW_KEY_ENTER;
    case XK_Home:
      return GLFW_KEY_HOME;
    case XK_End:
      return GLFW_KEY_END;
    case XK_Page_Up:
      return GLFW_KEY_PAGE_UP;
    case XK_Page_Down:
      return GLFW_KEY_PAGE_DOWN;
    case XK_Insert:
      return GLFW_KEY_INSERT;
    case XK_Left:
      return GLFW_KEY_LEFT;
    case XK_Right:
      return GLFW_KEY_RIGHT;
    case XK_Down:
      return GLFW_KEY_DOWN;
    case XK_Up:
      return GLFW_KEY_UP;
    case XK_F1:
      return GLFW_KEY_F1;
    case XK_F2:
      return GLFW_KEY_F2;
    case XK_F3:
      return GLFW_KEY_F3;
    case XK_F4:
      return GLFW_KEY_F4;
    case XK_F5:
      return GLFW_KEY_F5;
    case XK_F6:
      return GLFW_KEY_F6;
    case XK_F7:
      return GLFW_KEY_F7;
    case XK_F8:
      return GLFW_KEY_F8;
    case XK_F9:
      return GLFW_KEY_F9;
    case XK_F10:
      return GLFW_KEY_F10;
    case XK_F11:
      return GLFW_KEY_F11;
    case XK_F12:
      return GLFW_KEY_F12;
    case XK_F13:
      return GLFW_KEY_F13;
    case XK_F14:
      return GLFW_KEY_F14;
    case XK_F15:
      return GLFW_KEY_F15;
    case XK_F16:
      return GLFW_KEY_F16;
    case XK_F17:
      return GLFW_KEY_F17;
    case XK_F18:
      return GLFW_KEY_F18;
    case XK_F19:
      return GLFW_KEY_F19;
    case XK_F20:
      return GLFW_KEY_F20;
    case XK_F21:
      return GLFW_KEY_F21;
    case XK_F22:
      return GLFW_KEY_F22;
    case XK_F23:
      return GLFW_KEY_F23;
    case XK_F24:
      return GLFW_KEY_F24;
    case XK_F25:
      return GLFW_KEY_F25;

    // Numeric keypad
    case XK_KP_Divide:
      return GLFW_KEY_KP_DIVIDE;
    case XK_KP_Multiply:
      return GLFW_KEY_KP_MULTIPLY;
    case XK_KP_Subtract:
      return GLFW_KEY_KP_SUBTRACT;
    case XK_KP_Add:
      return GLFW_KEY_KP_ADD;

    // These should have been detected in secondary keysym test above!
    case XK_KP_Insert:
      return GLFW_KEY_KP_0;
    case XK_KP_End:
      return GLFW_KEY_KP_1;
    case XK_KP_Down:
      return GLFW_KEY_KP_2;
    case XK_KP_Page_Down:
      return GLFW_KEY_KP_3;
    case XK_KP_Left:
      return GLFW_KEY_KP_4;
    case XK_KP_Right:
      return GLFW_KEY_KP_6;
    case XK_KP_Home:
      return GLFW_KEY_KP_7;
    case XK_KP_Up:
      return GLFW_KEY_KP_8;
    case XK_KP_Page_Up:
      return GLFW_KEY_KP_9;
    case XK_KP_Delete:
      return GLFW_KEY_KP_DECIMAL;
    case XK_KP_Equal:
      return GLFW_KEY_KP_EQUAL;
    case XK_KP_Enter:
      return GLFW_KEY_KP_ENTER;

    // Last resort: Check for printable keys (should not happen if the XKB
    // extension is available). This will give a layout dependent mapping
    // (which is wrong, and we may miss some keys, especially on non-US
    // keyboards), but it's better than nothing...
    case XK_a:
      return GLFW_KEY_A;
    case XK_b:
      return GLFW_KEY_B;
    case XK_c:
      return GLFW_KEY_C;
    case XK_d:
      return GLFW_KEY_D;
    case XK_e:
      return GLFW_KEY_E;
    case XK_f:
      return GLFW_KEY_F;
    case XK_g:
      return GLFW_KEY_G;
    case XK_h:
      return GLFW_KEY_H;
    case XK_i:
      return GLFW_KEY_I;
    case XK_j:
      return GLFW_KEY_J;
    case XK_k:
      return GLFW_KEY_K;
    case XK_l:
      return GLFW_KEY_L;
    case XK_m:
      return GLFW_KEY_M;
    case XK_n:
      return GLFW_KEY_N;
    case XK_o:
      return GLFW_KEY_O;
    case XK_p:
      return GLFW_KEY_P;
    case XK_q:
      return GLFW_KEY_Q;
    case XK_r:
      return GLFW_KEY_R;
    case XK_s:
      return GLFW_KEY_S;
    case XK_t:
      return GLFW_KEY_T;
    case XK_u:
      return GLFW_KEY_U;
    case XK_v:
      return GLFW_KEY_V;
    case XK_w:
      return GLFW_KEY_W;
    case XK_x:
      return GLFW_KEY_X;
    case XK_y:
      return GLFW_KEY_Y;
    case XK_z:
      return GLFW_KEY_Z;
    case XK_1:
      return GLFW_KEY_1;
    case XK_2:
      return GLFW_KEY_2;
    case XK_3:
      return GLFW_KEY_3;
    case XK_4:
      return GLFW_KEY_4;
    case XK_5:
      return GLFW_KEY_5;
    case XK_6:
      return GLFW_KEY_6;
    case XK_7:
      return GLFW_KEY_7;
    case XK_8:
      return GLFW_KEY_8;
    case XK_9:
      return GLFW_KEY_9;
    case XK_0:
      return GLFW_KEY_0;
    case XK_space:
      return GLFW_KEY_SPACE;
    case XK_minus:
      return GLFW_KEY_MINUS;
    case XK_equal:
      return GLFW_KEY_EQUAL;
    case XK_bracketleft:
      return GLFW_KEY_LEFT_BRACKET;
    case XK_bracketright:
      return GLFW_KEY_RIGHT_BRACKET;
    case XK_backslash:
      return GLFW_KEY_BACKSLASH;
    case XK_semicolon:
      return GLFW_KEY_SEMICOLON;
    case XK_apostrophe:
      return GLFW_KEY_APOSTROPHE;
    case XK_grave:
      return GLFW_KEY_GRAVE_ACCENT;
    case XK_comma:
      return GLFW_KEY_COMMA;
    case XK_period:
      return GLFW_KEY_PERIOD;
    case XK_slash:
      return GLFW_KEY_SLASH;
    case XK_less:
      return GLFW_KEY_WORLD_1; // At least in some layouts...
    default:
      break;
  }

  // No matching translation was found
  return GLFW_KEY_UNKNOWN;
}

// Create key code translation tables
//
static void createKeyTables(void) {
  int scancode, scancodeMin, scancodeMax;

  memset(_glfw.x11.keycodes, -1, sizeof(_glfw.x11.keycodes));
  memset(_glfw.x11.scancodes, -1, sizeof(_glfw.x11.scancodes));

  if (_glfw.x11.xkb.available) {
    // Use XKB to determine physical key locations independently of the
    // current keyboard layout

    XkbDescPtr desc = XkbGetMap(_glfw.x11.display, 0, XkbUseCoreKbd);
    XkbGetNames(_glfw.x11.display, XkbKeyNamesMask | XkbKeyAliasesMask, desc);

    scancodeMin = desc->min_key_code;
    scancodeMax = desc->max_key_code;

    const struct
    {
      int key;
      char* name;
    } keymap[] =
        {
            {GLFW_KEY_GRAVE_ACCENT, "TLDE"},
            {GLFW_KEY_1, "AE01"},
            {GLFW_KEY_2, "AE02"},
            {GLFW_KEY_3, "AE03"},
            {GLFW_KEY_4, "AE04"},
            {GLFW_KEY_5, "AE05"},
            {GLFW_KEY_6, "AE06"},
            {GLFW_KEY_7, "AE07"},
            {GLFW_KEY_8, "AE08"},
            {GLFW_KEY_9, "AE09"},
            {GLFW_KEY_0, "AE10"},
            {GLFW_KEY_MINUS, "AE11"},
            {GLFW_KEY_EQUAL, "AE12"},
            {GLFW_KEY_Q, "AD01"},
            {GLFW_KEY_W, "AD02"},
            {GLFW_KEY_E, "AD03"},
            {GLFW_KEY_R, "AD04"},
            {GLFW_KEY_T, "AD05"},
            {GLFW_KEY_Y, "AD06"},
            {GLFW_KEY_U, "AD07"},
            {GLFW_KEY_I, "AD08"},
            {GLFW_KEY_O, "AD09"},
            {GLFW_KEY_P, "AD10"},
            {GLFW_KEY_LEFT_BRACKET, "AD11"},
            {GLFW_KEY_RIGHT_BRACKET, "AD12"},
            {GLFW_KEY_A, "AC01"},
            {GLFW_KEY_S, "AC02"},
            {GLFW_KEY_D, "AC03"},
            {GLFW_KEY_F, "AC04"},
            {GLFW_KEY_G, "AC05"},
            {GLFW_KEY_H, "AC06"},
            {GLFW_KEY_J, "AC07"},
            {GLFW_KEY_K, "AC08"},
            {GLFW_KEY_L, "AC09"},
            {GLFW_KEY_SEMICOLON, "AC10"},
            {GLFW_KEY_APOSTROPHE, "AC11"},
            {GLFW_KEY_Z, "AB01"},
            {GLFW_KEY_X, "AB02"},
            {GLFW_KEY_C, "AB03"},
            {GLFW_KEY_V, "AB04"},
            {GLFW_KEY_B, "AB05"},
            {GLFW_KEY_N, "AB06"},
            {GLFW_KEY_M, "AB07"},
            {GLFW_KEY_COMMA, "AB08"},
            {GLFW_KEY_PERIOD, "AB09"},
            {GLFW_KEY_SLASH, "AB10"},
            {GLFW_KEY_BACKSLASH, "BKSL"},
            {GLFW_KEY_WORLD_1, "LSGT"},
            {GLFW_KEY_SPACE, "SPCE"},
            {GLFW_KEY_ESCAPE, "ESC"},
            {GLFW_KEY_ENTER, "RTRN"},
            {GLFW_KEY_TAB, "TAB"},
            {GLFW_KEY_BACKSPACE, "BKSP"},
            {GLFW_KEY_INSERT, "INS"},
            {GLFW_KEY_DELETE, "DELE"},
            {GLFW_KEY_RIGHT, "RGHT"},
            {GLFW_KEY_LEFT, "LEFT"},
            {GLFW_KEY_DOWN, "DOWN"},
            {GLFW_KEY_UP, "UP"},
            {GLFW_KEY_PAGE_UP, "PGUP"},
            {GLFW_KEY_PAGE_DOWN, "PGDN"},
            {GLFW_KEY_HOME, "HOME"},
            {GLFW_KEY_END, "END"},
            {GLFW_KEY_CAPS_LOCK, "CAPS"},
            {GLFW_KEY_SCROLL_LOCK, "SCLK"},
            {GLFW_KEY_NUM_LOCK, "NMLK"},
            {GLFW_KEY_PRINT_SCREEN, "PRSC"},
            {GLFW_KEY_PAUSE, "PAUS"},
            {GLFW_KEY_F1, "FK01"},
            {GLFW_KEY_F2, "FK02"},
            {GLFW_KEY_F3, "FK03"},
            {GLFW_KEY_F4, "FK04"},
            {GLFW_KEY_F5, "FK05"},
            {GLFW_KEY_F6, "FK06"},
            {GLFW_KEY_F7, "FK07"},
            {GLFW_KEY_F8, "FK08"},
            {GLFW_KEY_F9, "FK09"},
            {GLFW_KEY_F10, "FK10"},
            {GLFW_KEY_F11, "FK11"},
            {GLFW_KEY_F12, "FK12"},
            {GLFW_KEY_F13, "FK13"},
            {GLFW_KEY_F14, "FK14"},
            {GLFW_KEY_F15, "FK15"},
            {GLFW_KEY_F16, "FK16"},
            {GLFW_KEY_F17, "FK17"},
            {GLFW_KEY_F18, "FK18"},
            {GLFW_KEY_F19, "FK19"},
            {GLFW_KEY_F20, "FK20"},
            {GLFW_KEY_F21, "FK21"},
            {GLFW_KEY_F22, "FK22"},
            {GLFW_KEY_F23, "FK23"},
            {GLFW_KEY_F24, "FK24"},
            {GLFW_KEY_F25, "FK25"},
            {GLFW_KEY_KP_0, "KP0"},
            {GLFW_KEY_KP_1, "KP1"},
            {GLFW_KEY_KP_2, "KP2"},
            {GLFW_KEY_KP_3, "KP3"},
            {GLFW_KEY_KP_4, "KP4"},
            {GLFW_KEY_KP_5, "KP5"},
            {GLFW_KEY_KP_6, "KP6"},
            {GLFW_KEY_KP_7, "KP7"},
            {GLFW_KEY_KP_8, "KP8"},
            {GLFW_KEY_KP_9, "KP9"},
            {GLFW_KEY_KP_DECIMAL, "KPDL"},
            {GLFW_KEY_KP_DIVIDE, "KPDV"},
            {GLFW_KEY_KP_MULTIPLY, "KPMU"},
            {GLFW_KEY_KP_SUBTRACT, "KPSU"},
            {GLFW_KEY_KP_ADD, "KPAD"},
            {GLFW_KEY_KP_ENTER, "KPEN"},
            {GLFW_KEY_KP_EQUAL, "KPEQ"},
            {GLFW_KEY_LEFT_SHIFT, "LFSH"},
            {GLFW_KEY_LEFT_CONTROL, "LCTL"},
            {GLFW_KEY_LEFT_ALT, "LALT"},
            {GLFW_KEY_LEFT_SUPER, "LWIN"},
            {GLFW_KEY_RIGHT_SHIFT, "RTSH"},
            {GLFW_KEY_RIGHT_CONTROL, "RCTL"},
            {GLFW_KEY_RIGHT_ALT, "RALT"},
            {GLFW_KEY_RIGHT_ALT, "LVL3"},
            {GLFW_KEY_RIGHT_ALT, "MDSW"},
            {GLFW_KEY_RIGHT_SUPER, "RWIN"},
            {GLFW_KEY_MENU, "MENU"}};

    // Find the X11 key code -> GLFW key code mapping
    for (scancode = scancodeMin; scancode <= scancodeMax; scancode++) {
      int key = GLFW_KEY_UNKNOWN;

      // Map the key name to a GLFW key code. Note: We use the US
      // keyboard layout. Because function keys aren't mapped correctly
      // when using traditional KeySym translations, they are mapped
      // here instead.
      for (size_t i = 0; i < sizeof(keymap) / sizeof(keymap[0]); i++) {
        if (strncmp(desc->names->keys[scancode].name,
                    keymap[i].name,
                    XkbKeyNameLength) == 0) {
          key = keymap[i].key;
          break;
        }
      }

      // Fall back to key aliases in case the key name did not match
      for (int i = 0; i < desc->names->num_key_aliases; i++) {
        if (key != GLFW_KEY_UNKNOWN)
          break;

        if (strncmp(desc->names->key_aliases[i].real,
                    desc->names->keys[scancode].name,
                    XkbKeyNameLength) != 0) {
          continue;
        }

        for (size_t j = 0; j < sizeof(keymap) / sizeof(keymap[0]); j++) {
          if (strncmp(desc->names->key_aliases[i].alias,
                      keymap[j].name,
                      XkbKeyNameLength) == 0) {
            key = keymap[j].key;
            break;
          }
        }
      }

      _glfw.x11.keycodes[scancode] = key;
    }

    XkbFreeNames(desc, XkbKeyNamesMask, True);
    XkbFreeKeyboard(desc, 0, True);
  } else
    XDisplayKeycodes(_glfw.x11.display, &scancodeMin, &scancodeMax);

  int width;
  KeySym* keysyms = XGetKeyboardMapping(_glfw.x11.display,
                                        scancodeMin,
                                        scancodeMax - scancodeMin + 1,
                                        &width);

  for (scancode = scancodeMin; scancode <= scancodeMax; scancode++) {
    // Translate the un-translated key codes using traditional X11 KeySym
    // lookups
    if (_glfw.x11.keycodes[scancode] < 0) {
      const size_t base = (scancode - scancodeMin) * width;
      _glfw.x11.keycodes[scancode] = translateKeySyms(&keysyms[base], width);
    }

    // Store the reverse translation for faster key name lookup
    if (_glfw.x11.keycodes[scancode] > 0)
      _glfw.x11.scancodes[_glfw.x11.keycodes[scancode]] = scancode;
  }

  XFree(keysyms);
}

// Check whether the IM has a usable style
//
static GLFWbool hasUsableInputMethodStyle(void) {
  GLFWbool found = GLFW_FALSE;
  XIMStyles* styles = NULL;

  if (XGetIMValues(_glfw.x11.im, XNQueryInputStyle, &styles, NULL) != NULL)
    return GLFW_FALSE;

  for (unsigned int i = 0; i < styles->count_styles; i++) {
    if (styles->supported_styles[i] == (XIMPreeditNothing | XIMStatusNothing)) {
      found = GLFW_TRUE;
      break;
    }
  }

  XFree(styles);
  return found;
}

// Check whether the specified atom is supported
//
static Atom getAtomIfSupported(Atom* supportedAtoms,
                               unsigned long atomCount,
                               const char* atomName) {
  const Atom atom = XInternAtom(_glfw.x11.display, atomName, False);

  for (unsigned long i = 0; i < atomCount; i++) {
    if (supportedAtoms[i] == atom)
      return atom;
  }

  return None;
}

// Check whether the running window manager is EWMH-compliant
//
static void detectEWMH(void) {
  // First we read the _NET_SUPPORTING_WM_CHECK property on the root window

  Window* windowFromRoot = NULL;
  if (!_glfwGetWindowPropertyX11(_glfw.x11.root,
                                 _glfw.x11.NET_SUPPORTING_WM_CHECK,
                                 XA_WINDOW,
                                 (unsigned char**)&windowFromRoot)) {
    return;
  }

  _glfwGrabErrorHandlerX11();

  // If it exists, it should be the XID of a top-level window
  // Then we look for the same property on that window

  Window* windowFromChild = NULL;
  if (!_glfwGetWindowPropertyX11(*windowFromRoot,
                                 _glfw.x11.NET_SUPPORTING_WM_CHECK,
                                 XA_WINDOW,
                                 (unsigned char**)&windowFromChild)) {
    XFree(windowFromRoot);
    return;
  }

  _glfwReleaseErrorHandlerX11();

  // If the property exists, it should contain the XID of the window

  if (*windowFromRoot != *windowFromChild) {
    XFree(windowFromRoot);
    XFree(windowFromChild);
    return;
  }

  XFree(windowFromRoot);
  XFree(windowFromChild);

  // We are now fairly sure that an EWMH-compliant WM is currently running
  // We can now start querying the WM about what features it supports by
  // looking in the _NET_SUPPORTED property on the root window
  // It should contain a list of supported EWMH protocol and state atoms

  Atom* supportedAtoms = NULL;
  const unsigned long atomCount =
      _glfwGetWindowPropertyX11(_glfw.x11.root,
                                _glfw.x11.NET_SUPPORTED,
                                XA_ATOM,
                                (unsigned char**)&supportedAtoms);

  // See which of the atoms we support that are supported by the WM

  _glfw.x11.NET_WM_STATE =
      getAtomIfSupported(supportedAtoms, atomCount, "_NET_WM_STATE");
  _glfw.x11.NET_WM_STATE_ABOVE =
      getAtomIfSupported(supportedAtoms, atomCount, "_NET_WM_STATE_ABOVE");
  _glfw.x11.NET_WM_STATE_FULLSCREEN =
      getAtomIfSupported(supportedAtoms, atomCount, "_NET_WM_STATE_FULLSCREEN");
  _glfw.x11.NET_WM_STATE_MAXIMIZED_VERT =
      getAtomIfSupported(supportedAtoms, atomCount, "_NET_WM_STATE_MAXIMIZED_VERT");
  _glfw.x11.NET_WM_STATE_MAXIMIZED_HORZ =
      getAtomIfSupported(supportedAtoms, atomCount, "_NET_WM_STATE_MAXIMIZED_HORZ");
  _glfw.x11.NET_WM_STATE_DEMANDS_ATTENTION =
      getAtomIfSupported(supportedAtoms, atomCount, "_NET_WM_STATE_DEMANDS_ATTENTION");
  _glfw.x11.NET_WM_FULLSCREEN_MONITORS =
      getAtomIfSupported(supportedAtoms, atomCount, "_NET_WM_FULLSCREEN_MONITORS");
  _glfw.x11.NET_WM_WINDOW_TYPE =
      getAtomIfSupported(supportedAtoms, atomCount, "_NET_WM_WINDOW_TYPE");
  _glfw.x11.NET_WM_WINDOW_TYPE_NORMAL =
      getAtomIfSupported(supportedAtoms, atomCount, "_NET_WM_WINDOW_TYPE_NORMAL");
  _glfw.x11.NET_WORKAREA =
      getAtomIfSupported(supportedAtoms, atomCount, "_NET_WORKAREA");
  _glfw.x11.NET_CURRENT_DESKTOP =
      getAtomIfSupported(supportedAtoms, atomCount, "_NET_CURRENT_DESKTOP");
  _glfw.x11.NET_ACTIVE_WINDOW =
      getAtomIfSupported(supportedAtoms, atomCount, "_NET_ACTIVE_WINDOW");
  _glfw.x11.NET_FRAME_EXTENTS =
      getAtomIfSupported(supportedAtoms, atomCount, "_NET_FRAME_EXTENTS");
  _glfw.x11.NET_REQUEST_FRAME_EXTENTS =
      getAtomIfSupported(supportedAtoms, atomCount, "_NET_REQUEST_FRAME_EXTENTS");

  if (supportedAtoms)
    XFree(supportedAtoms);
}

// Look for and initialize supported X11 extensions
//
static GLFWbool initExtensions(void) {
  _glfw.x11.vidmode.handle = _glfw_dlopen("libXxf86vm.so.1");
  if (_glfw.x11.vidmode.handle) {
    _glfw.x11.vidmode.QueryExtension = (PFN_XF86VidModeQueryExtension)
        _glfw_dlsym(_glfw.x11.vidmode.handle, "XF86VidModeQueryExtension");
    _glfw.x11.vidmode.GetGammaRamp = (PFN_XF86VidModeGetGammaRamp)
        _glfw_dlsym(_glfw.x11.vidmode.handle, "XF86VidModeGetGammaRamp");
    _glfw.x11.vidmode.SetGammaRamp = (PFN_XF86VidModeSetGammaRamp)
        _glfw_dlsym(_glfw.x11.vidmode.handle, "XF86VidModeSetGammaRamp");
    _glfw.x11.vidmode.GetGammaRampSize = (PFN_XF86VidModeGetGammaRampSize)
        _glfw_dlsym(_glfw.x11.vidmode.handle, "XF86VidModeGetGammaRampSize");

    _glfw.x11.vidmode.available =
        XF86VidModeQueryExtension(_glfw.x11.display,
                                  &_glfw.x11.vidmode.eventBase,
                                  &_glfw.x11.vidmode.errorBase);
  }

#if defined(__CYGWIN__)
  _glfw.x11.xi.handle = _glfw_dlopen("libXi-6.so");
#else
  _glfw.x11.xi.handle = _glfw_dlopen("libXi.so.6");
#endif
  if (_glfw.x11.xi.handle) {
    _glfw.x11.xi.QueryVersion = (PFN_XIQueryVersion)
        _glfw_dlsym(_glfw.x11.xi.handle, "XIQueryVersion");
    _glfw.x11.xi.SelectEvents = (PFN_XISelectEvents)
        _glfw_dlsym(_glfw.x11.xi.handle, "XISelectEvents");

    if (XQueryExtension(_glfw.x11.display,
                        "XInputExtension",
                        &_glfw.x11.xi.majorOpcode,
                        &_glfw.x11.xi.eventBase,
                        &_glfw.x11.xi.errorBase)) {
      _glfw.x11.xi.major = 2;
      _glfw.x11.xi.minor = 0;

      if (XIQueryVersion(_glfw.x11.display,
                         &_glfw.x11.xi.major,
                         &_glfw.x11.xi.minor) == Success) {
        _glfw.x11.xi.available = GLFW_TRUE;
      }
    }
  }

#if defined(__CYGWIN__)
  _glfw.x11.randr.handle = _glfw_dlopen("libXrandr-2.so");
#else
  _glfw.x11.randr.handle = _glfw_dlopen("libXrandr.so.2");
#endif
  if (_glfw.x11.randr.handle) {
    _glfw.x11.randr.AllocGamma = (PFN_XRRAllocGamma)
        _glfw_dlsym(_glfw.x11.randr.handle, "XRRAllocGamma");
    _glfw.x11.randr.FreeGamma = (PFN_XRRFreeGamma)
        _glfw_dlsym(_glfw.x11.randr.handle, "XRRFreeGamma");
    _glfw.x11.randr.FreeCrtcInfo = (PFN_XRRFreeCrtcInfo)
        _glfw_dlsym(_glfw.x11.randr.handle, "XRRFreeCrtcInfo");
    _glfw.x11.randr.FreeGamma = (PFN_XRRFreeGamma)
        _glfw_dlsym(_glfw.x11.randr.handle, "XRRFreeGamma");
    _glfw.x11.randr.FreeOutputInfo = (PFN_XRRFreeOutputInfo)
        _glfw_dlsym(_glfw.x11.randr.handle, "XRRFreeOutputInfo");
    _glfw.x11.randr.FreeScreenResources = (PFN_XRRFreeScreenResources)
        _glfw_dlsym(_glfw.x11.randr.handle, "XRRFreeScreenResources");
    _glfw.x11.randr.GetCrtcGamma = (PFN_XRRGetCrtcGamma)
        _glfw_dlsym(_glfw.x11.randr.handle, "XRRGetCrtcGamma");
    _glfw.x11.randr.GetCrtcGammaSize = (PFN_XRRGetCrtcGammaSize)
        _glfw_dlsym(_glfw.x11.randr.handle, "XRRGetCrtcGammaSize");
    _glfw.x11.randr.GetCrtcInfo = (PFN_XRRGetCrtcInfo)
        _glfw_dlsym(_glfw.x11.randr.handle, "XRRGetCrtcInfo");
    _glfw.x11.randr.GetOutputInfo = (PFN_XRRGetOutputInfo)
        _glfw_dlsym(_glfw.x11.randr.handle, "XRRGetOutputInfo");
    _glfw.x11.randr.GetOutputPrimary = (PFN_XRRGetOutputPrimary)
        _glfw_dlsym(_glfw.x11.randr.handle, "XRRGetOutputPrimary");
    _glfw.x11.randr.GetScreenResourcesCurrent = (PFN_XRRGetScreenResourcesCurrent)
        _glfw_dlsym(_glfw.x11.randr.handle, "XRRGetScreenResourcesCurrent");
    _glfw.x11.randr.QueryExtension = (PFN_XRRQueryExtension)
        _glfw_dlsym(_glfw.x11.randr.handle, "XRRQueryExtension");
    _glfw.x11.randr.QueryVersion = (PFN_XRRQueryVersion)
        _glfw_dlsym(_glfw.x11.randr.handle, "XRRQueryVersion");
    _glfw.x11.randr.SelectInput = (PFN_XRRSelectInput)
        _glfw_dlsym(_glfw.x11.randr.handle, "XRRSelectInput");
    _glfw.x11.randr.SetCrtcConfig = (PFN_XRRSetCrtcConfig)
        _glfw_dlsym(_glfw.x11.randr.handle, "XRRSetCrtcConfig");
    _glfw.x11.randr.SetCrtcGamma = (PFN_XRRSetCrtcGamma)
        _glfw_dlsym(_glfw.x11.randr.handle, "XRRSetCrtcGamma");
    _glfw.x11.randr.UpdateConfiguration = (PFN_XRRUpdateConfiguration)
        _glfw_dlsym(_glfw.x11.randr.handle, "XRRUpdateConfiguration");

    if (XRRQueryExtension(_glfw.x11.display,
                          &_glfw.x11.randr.eventBase,
                          &_glfw.x11.randr.errorBase)) {
      if (XRRQueryVersion(_glfw.x11.display,
                          &_glfw.x11.randr.major,
                          &_glfw.x11.randr.minor)) {
        // The GLFW RandR path requires at least version 1.3
        if (_glfw.x11.randr.major > 1 || _glfw.x11.randr.minor >= 3)
          _glfw.x11.randr.available = GLFW_TRUE;
      } else {
        _glfwInputError(GLFW_PLATFORM_ERROR,
                        "X11: Failed to query RandR version");
      }
    }
  }

  if (_glfw.x11.randr.available) {
    XRRScreenResources* sr = XRRGetScreenResourcesCurrent(_glfw.x11.display,
                                                          _glfw.x11.root);

    if (!sr->ncrtc || !XRRGetCrtcGammaSize(_glfw.x11.display, sr->crtcs[0])) {
      // This is likely an older Nvidia driver with broken gamma support
      // Flag it as useless and fall back to xf86vm gamma, if available
      _glfw.x11.randr.gammaBroken = GLFW_TRUE;
    }

    if (!sr->ncrtc) {
      // A system without CRTCs is likely a system with broken RandR
      // Disable the RandR monitor path and fall back to core functions
      _glfw.x11.randr.monitorBroken = GLFW_TRUE;
    }

    XRRFreeScreenResources(sr);
  }

  if (_glfw.x11.randr.available && !_glfw.x11.randr.monitorBroken) {
    XRRSelectInput(_glfw.x11.display, _glfw.x11.root, RROutputChangeNotifyMask);
  }

#if defined(__CYGWIN__)
  _glfw.x11.xcursor.handle = _glfw_dlopen("libXcursor-1.so");
#else
  _glfw.x11.xcursor.handle = _glfw_dlopen("libXcursor.so.1");
#endif
  if (_glfw.x11.xcursor.handle) {
    _glfw.x11.xcursor.ImageCreate = (PFN_XcursorImageCreate)
        _glfw_dlsym(_glfw.x11.xcursor.handle, "XcursorImageCreate");
    _glfw.x11.xcursor.ImageDestroy = (PFN_XcursorImageDestroy)
        _glfw_dlsym(_glfw.x11.xcursor.handle, "XcursorImageDestroy");
    _glfw.x11.xcursor.ImageLoadCursor = (PFN_XcursorImageLoadCursor)
        _glfw_dlsym(_glfw.x11.xcursor.handle, "XcursorImageLoadCursor");
  }

#if defined(__CYGWIN__)
  _glfw.x11.xinerama.handle = _glfw_dlopen("libXinerama-1.so");
#else
  _glfw.x11.xinerama.handle = _glfw_dlopen("libXinerama.so.1");
#endif
  if (_glfw.x11.xinerama.handle) {
    _glfw.x11.xinerama.IsActive = (PFN_XineramaIsActive)
        _glfw_dlsym(_glfw.x11.xinerama.handle, "XineramaIsActive");
    _glfw.x11.xinerama.QueryExtension = (PFN_XineramaQueryExtension)
        _glfw_dlsym(_glfw.x11.xinerama.handle, "XineramaQueryExtension");
    _glfw.x11.xinerama.QueryScreens = (PFN_XineramaQueryScreens)
        _glfw_dlsym(_glfw.x11.xinerama.handle, "XineramaQueryScreens");

    if (XineramaQueryExtension(_glfw.x11.display,
                               &_glfw.x11.xinerama.major,
                               &_glfw.x11.xinerama.minor)) {
      if (XineramaIsActive(_glfw.x11.display))
        _glfw.x11.xinerama.available = GLFW_TRUE;
    }
  }

  _glfw.x11.xkb.major = 1;
  _glfw.x11.xkb.minor = 0;
  _glfw.x11.xkb.available =
      XkbQueryExtension(_glfw.x11.display,
                        &_glfw.x11.xkb.majorOpcode,
                        &_glfw.x11.xkb.eventBase,
                        &_glfw.x11.xkb.errorBase,
                        &_glfw.x11.xkb.major,
                        &_glfw.x11.xkb.minor);

  if (_glfw.x11.xkb.available) {
    Bool supported;

    if (XkbSetDetectableAutoRepeat(_glfw.x11.display, True, &supported)) {
      if (supported)
        _glfw.x11.xkb.detectable = GLFW_TRUE;
    }

    XkbStateRec state;
    if (XkbGetState(_glfw.x11.display, XkbUseCoreKbd, &state) == Success)
      _glfw.x11.xkb.group = (unsigned int)state.group;

    XkbSelectEventDetails(_glfw.x11.display, XkbUseCoreKbd, XkbStateNotify, XkbGroupStateMask, XkbGroupStateMask);
  }

#if defined(__CYGWIN__)
  _glfw.x11.x11xcb.handle = _glfw_dlopen("libX11-xcb-1.so");
#else
  _glfw.x11.x11xcb.handle = _glfw_dlopen("libX11-xcb.so.1");
#endif
  if (_glfw.x11.x11xcb.handle) {
    _glfw.x11.x11xcb.GetXCBConnection = (PFN_XGetXCBConnection)
        _glfw_dlsym(_glfw.x11.x11xcb.handle, "XGetXCBConnection");
  }

#if defined(__CYGWIN__)
  _glfw.x11.xrender.handle = _glfw_dlopen("libXrender-1.so");
#else
  _glfw.x11.xrender.handle = _glfw_dlopen("libXrender.so.1");
#endif
  if (_glfw.x11.xrender.handle) {
    _glfw.x11.xrender.QueryExtension = (PFN_XRenderQueryExtension)
        _glfw_dlsym(_glfw.x11.xrender.handle, "XRenderQueryExtension");
    _glfw.x11.xrender.QueryVersion = (PFN_XRenderQueryVersion)
        _glfw_dlsym(_glfw.x11.xrender.handle, "XRenderQueryVersion");
    _glfw.x11.xrender.FindVisualFormat = (PFN_XRenderFindVisualFormat)
        _glfw_dlsym(_glfw.x11.xrender.handle, "XRenderFindVisualFormat");

    if (XRenderQueryExtension(_glfw.x11.display,
                              &_glfw.x11.xrender.errorBase,
                              &_glfw.x11.xrender.eventBase)) {
      if (XRenderQueryVersion(_glfw.x11.display,
                              &_glfw.x11.xrender.major,
                              &_glfw.x11.xrender.minor)) {
        _glfw.x11.xrender.available = GLFW_TRUE;
      }
    }
  }

  // Update the key code LUT
  // FIXME: We should listen to XkbMapNotify events to track changes to
  // the keyboard mapping.
  createKeyTables();

  // String format atoms
  _glfw.x11.NULL_ = XInternAtom(_glfw.x11.display, "NULL", False);
  _glfw.x11.UTF8_STRING = XInternAtom(_glfw.x11.display, "UTF8_STRING", False);
  _glfw.x11.ATOM_PAIR = XInternAtom(_glfw.x11.display, "ATOM_PAIR", False);

  // Custom selection property atom
  _glfw.x11.GLFW_SELECTION =
      XInternAtom(_glfw.x11.display, "GLFW_SELECTION", False);

  // ICCCM standard clipboard atoms
  _glfw.x11.TARGETS = XInternAtom(_glfw.x11.display, "TARGETS", False);
  _glfw.x11.MULTIPLE = XInternAtom(_glfw.x11.display, "MULTIPLE", False);
  _glfw.x11.PRIMARY = XInternAtom(_glfw.x11.display, "PRIMARY", False);
  _glfw.x11.INCR = XInternAtom(_glfw.x11.display, "INCR", False);
  _glfw.x11.CLIPBOARD = XInternAtom(_glfw.x11.display, "CLIPBOARD", False);

  // Clipboard manager atoms
  _glfw.x11.CLIPBOARD_MANAGER =
      XInternAtom(_glfw.x11.display, "CLIPBOARD_MANAGER", False);
  _glfw.x11.SAVE_TARGETS =
      XInternAtom(_glfw.x11.display, "SAVE_TARGETS", False);

  // Xdnd (drag and drop) atoms
  _glfw.x11.XdndAware = XInternAtom(_glfw.x11.display, "XdndAware", False);
  _glfw.x11.XdndEnter = XInternAtom(_glfw.x11.display, "XdndEnter", False);
  _glfw.x11.XdndPosition = XInternAtom(_glfw.x11.display, "XdndPosition", False);
  _glfw.x11.XdndStatus = XInternAtom(_glfw.x11.display, "XdndStatus", False);
  _glfw.x11.XdndActionCopy = XInternAtom(_glfw.x11.display, "XdndActionCopy", False);
  _glfw.x11.XdndDrop = XInternAtom(_glfw.x11.display, "XdndDrop", False);
  _glfw.x11.XdndFinished = XInternAtom(_glfw.x11.display, "XdndFinished", False);
  _glfw.x11.XdndSelection = XInternAtom(_glfw.x11.display, "XdndSelection", False);
  _glfw.x11.XdndTypeList = XInternAtom(_glfw.x11.display, "XdndTypeList", False);
  _glfw.x11.text_uri_list = XInternAtom(_glfw.x11.display, "text/uri-list", False);

  // ICCCM, EWMH and Motif window property atoms
  // These can be set safely even without WM support
  // The EWMH atoms that require WM support are handled in detectEWMH
  _glfw.x11.WM_PROTOCOLS =
      XInternAtom(_glfw.x11.display, "WM_PROTOCOLS", False);
  _glfw.x11.WM_STATE =
      XInternAtom(_glfw.x11.display, "WM_STATE", False);
  _glfw.x11.WM_DELETE_WINDOW =
      XInternAtom(_glfw.x11.display, "WM_DELETE_WINDOW", False);
  _glfw.x11.NET_SUPPORTED =
      XInternAtom(_glfw.x11.display, "_NET_SUPPORTED", False);
  _glfw.x11.NET_SUPPORTING_WM_CHECK =
      XInternAtom(_glfw.x11.display, "_NET_SUPPORTING_WM_CHECK", False);
  _glfw.x11.NET_WM_ICON =
      XInternAtom(_glfw.x11.display, "_NET_WM_ICON", False);
  _glfw.x11.NET_WM_PING =
      XInternAtom(_glfw.x11.display, "_NET_WM_PING", False);
  _glfw.x11.NET_WM_PID =
      XInternAtom(_glfw.x11.display, "_NET_WM_PID", False);
  _glfw.x11.NET_WM_NAME =
      XInternAtom(_glfw.x11.display, "_NET_WM_NAME", False);
  _glfw.x11.NET_WM_ICON_NAME =
      XInternAtom(_glfw.x11.display, "_NET_WM_ICON_NAME", False);
  _glfw.x11.NET_WM_BYPASS_COMPOSITOR =
      XInternAtom(_glfw.x11.display, "_NET_WM_BYPASS_COMPOSITOR", False);
  _glfw.x11.NET_WM_WINDOW_OPACITY =
      XInternAtom(_glfw.x11.display, "_NET_WM_WINDOW_OPACITY", False);
  _glfw.x11.MOTIF_WM_HINTS =
      XInternAtom(_glfw.x11.display, "_MOTIF_WM_HINTS", False);

  // The compositing manager selection name contains the screen number
  {
    char name[32];
    snprintf(name, sizeof(name), "_NET_WM_CM_S%u", _glfw.x11.screen);
    _glfw.x11.NET_WM_CM_Sx = XInternAtom(_glfw.x11.display, name, False);
  }

  // Detect whether an EWMH-conformant window manager is running
  detectEWMH();

  return GLFW_TRUE;
}

// Retrieve system content scale via folklore heuristics
//
static void getSystemContentScale(float* xscale, float* yscale) {
  // Start by assuming the default X11 DPI
  // NOTE: Some desktop environments (KDE) may remove the Xft.dpi field when it
  //       would be set to 96, so assume that is the case if we cannot find it
  float xdpi = 96.f, ydpi = 96.f;

  // NOTE: Basing the scale on Xft.dpi where available should provide the most
  //       consistent user experience (matches Qt, Gtk, etc), although not
  //       always the most accurate one
  char* rms = XResourceManagerString(_glfw.x11.display);
  if (rms) {
    XrmDatabase db = XrmGetStringDatabase(rms);
    if (db) {
      XrmValue value;
      char* type = NULL;

      if (XrmGetResource(db, "Xft.dpi", "Xft.Dpi", &type, &value)) {
        if (type && strcmp(type, "String") == 0)
          xdpi = ydpi = atof(value.addr);
      }

      XrmDestroyDatabase(db);
    }
  }

  *xscale = xdpi / 96.f;
  *yscale = ydpi / 96.f;
}

// Create a blank cursor for hidden and disabled cursor modes
//
static Cursor createHiddenCursor(void) {
  unsigned char pixels[16 * 16 * 4] = {0};
  GLFWimage image = {16, 16, pixels};
  return _glfwCreateCursorX11(&image, 0, 0);
}

// Create a helper window for IPC
//
static Window createHelperWindow(void) {
  XSetWindowAttributes wa;
  wa.event_mask = PropertyChangeMask;

  return XCreateWindow(_glfw.x11.display, _glfw.x11.root, 0, 0, 1, 1, 0, 0, InputOnly, DefaultVisual(_glfw.x11.display, _glfw.x11.screen), CWEventMask, &wa);
}

// X error handler
//
static int errorHandler(Display* display, XErrorEvent* event) {
  if (_glfw.x11.display != display)
    return 0;

  _glfw.x11.errorCode = event->error_code;
  return 0;
}

//////////////////////////////////////////////////////////////////////////
//////                       GLFW internal API                      //////
//////////////////////////////////////////////////////////////////////////

// Sets the X error handler callback
//
void _glfwGrabErrorHandlerX11(void) {
  _glfw.x11.errorCode = Success;
  XSetErrorHandler(errorHandler);
}

// Clears the X error handler callback
//
void _glfwReleaseErrorHandlerX11(void) {
  // Synchronize to make sure all commands are processed
  XSync(_glfw.x11.display, False);
  XSetErrorHandler(NULL);
}

// Reports the specified error, appending information about the last X error
//
void _glfwInputErrorX11(int error, const char* message) {
  char buffer[_GLFW_MESSAGE_SIZE];
  XGetErrorText(_glfw.x11.display, _glfw.x11.errorCode, buffer, sizeof(buffer));

  _glfwInputError(error, "%s: %s", message, buffer);
}

// Creates a native cursor object from the specified image and hotspot
//
Cursor _glfwCreateCursorX11(const GLFWimage* image, int xhot, int yhot) {
  int i;
  Cursor cursor;

  if (!_glfw.x11.xcursor.handle)
    return None;

  XcursorImage* native = XcursorImageCreate(image->width, image->height);
  if (native == NULL)
    return None;

  native->xhot = xhot;
  native->yhot = yhot;

  unsigned char* source = (unsigned char*)image->pixels;
  XcursorPixel* target = native->pixels;

  for (i = 0; i < image->width * image->height; i++, target++, source += 4) {
    unsigned int alpha = source[3];

    *target = (alpha << 24) |
              ((unsigned char)((source[0] * alpha) / 255) << 16) |
              ((unsigned char)((source[1] * alpha) / 255) << 8) |
              ((unsigned char)((source[2] * alpha) / 255) << 0);
  }

  cursor = XcursorImageLoadCursor(_glfw.x11.display, native);
  XcursorImageDestroy(native);

  return cursor;
}

//////////////////////////////////////////////////////////////////////////
//////                       GLFW platform API                      //////
//////////////////////////////////////////////////////////////////////////

int _glfwPlatformInit(void) {
  // HACK: If the application has left the locale as "C" then both wide
  //       character text input and explicit UTF-8 input via XIM will break
  //       This sets the CTYPE part of the current locale from the environment
  //       in the hope that it is set to something more sane than "C"
  if (strcmp(setlocale(LC_CTYPE, NULL), "C") == 0)
    setlocale(LC_CTYPE, "");

  XInitThreads();
  XrmInitialize();

  _glfw.x11.display = XOpenDisplay(NULL);
  if (!_glfw.x11.display) {
    const char* display = getenv("DISPLAY");
    if (display) {
      _glfwInputError(GLFW_PLATFORM_ERROR,
                      "X11: Failed to open display %s",
                      display);
    } else {
      _glfwInputError(GLFW_PLATFORM_ERROR,
                      "X11: The DISPLAY environment variable is missing");
    }

    return GLFW_FALSE;
  }

  _glfw.x11.screen = DefaultScreen(_glfw.x11.display);
  _glfw.x11.root = RootWindow(_glfw.x11.display, _glfw.x11.screen);
  _glfw.x11.context = XUniqueContext();

  getSystemContentScale(&_glfw.x11.contentScaleX, &_glfw.x11.contentScaleY);

  if (!initExtensions())
    return GLFW_FALSE;

  _glfw.x11.helperWindowHandle = createHelperWindow();
  _glfw.x11.hiddenCursorHandle = createHiddenCursor();

  if (XSupportsLocale()) {
    XSetLocaleModifiers("");

    _glfw.x11.im = XOpenIM(_glfw.x11.display, 0, NULL, NULL);
    if (_glfw.x11.im) {
      if (!hasUsableInputMethodStyle()) {
        XCloseIM(_glfw.x11.im);
        _glfw.x11.im = NULL;
      }
    }
  }

#if defined(__linux__)
  if (!_glfwInitJoysticksLinux())
    return GLFW_FALSE;
#endif

  _glfwInitTimerPOSIX();

  _glfwPollMonitorsX11();
  return GLFW_TRUE;
}

void _glfwPlatformTerminate(void) {
  if (_glfw.x11.helperWindowHandle) {
    if (XGetSelectionOwner(_glfw.x11.display, _glfw.x11.CLIPBOARD) ==
        _glfw.x11.helperWindowHandle) {
      _glfwPushSelectionToManagerX11();
    }

    XDestroyWindow(_glfw.x11.display, _glfw.x11.helperWindowHandle);
    _glfw.x11.helperWindowHandle = None;
  }

  if (_glfw.x11.hiddenCursorHandle) {
    XFreeCursor(_glfw.x11.display, _glfw.x11.hiddenCursorHandle);
    _glfw.x11.hiddenCursorHandle = (Cursor)0;
  }

  free(_glfw.x11.primarySelectionString);
  free(_glfw.x11.clipboardString);

  if (_glfw.x11.im) {
    XCloseIM(_glfw.x11.im);
    _glfw.x11.im = NULL;
  }

  if (_glfw.x11.display) {
    XCloseDisplay(_glfw.x11.display);
    _glfw.x11.display = NULL;
  }

  if (_glfw.x11.x11xcb.handle) {
    _glfw_dlclose(_glfw.x11.x11xcb.handle);
    _glfw.x11.x11xcb.handle = NULL;
  }

  if (_glfw.x11.xcursor.handle) {
    _glfw_dlclose(_glfw.x11.xcursor.handle);
    _glfw.x11.xcursor.handle = NULL;
  }

  if (_glfw.x11.randr.handle) {
    _glfw_dlclose(_glfw.x11.randr.handle);
    _glfw.x11.randr.handle = NULL;
  }

  if (_glfw.x11.xinerama.handle) {
    _glfw_dlclose(_glfw.x11.xinerama.handle);
    _glfw.x11.xinerama.handle = NULL;
  }

  if (_glfw.x11.xrender.handle) {
    _glfw_dlclose(_glfw.x11.xrender.handle);
    _glfw.x11.xrender.handle = NULL;
  }

  if (_glfw.x11.vidmode.handle) {
    _glfw_dlclose(_glfw.x11.vidmode.handle);
    _glfw.x11.vidmode.handle = NULL;
  }

  if (_glfw.x11.xi.handle) {
    _glfw_dlclose(_glfw.x11.xi.handle);
    _glfw.x11.xi.handle = NULL;
  }

  // NOTE: These need to be unloaded after XCloseDisplay, as they register
  //       cleanup callbacks that get called by that function
  _glfwTerminateEGL();
  _glfwTerminateGLX();

#if defined(__linux__)
  _glfwTerminateJoysticksLinux();
#endif
}

const char* _glfwPlatformGetVersionString(void) {
  return _GLFW_VERSION_NUMBER " X11 GLX EGL OSMesa"
#if defined(_POSIX_TIMERS) && defined(_POSIX_MONOTONIC_CLOCK)
                              " clock_gettime"
#else
                              " gettimeofday"
#endif
#if defined(__linux__)
                              " evdev"
#endif
#if defined(_GLFW_BUILD_DLL)
                              " shared"
#endif
      ;
}
